Grumbach was a knight who’s invariably described as an “adventurer”. As a young man he fought in the Peasants War, but as he headed into middle age he became your basic penniless minor nobleman chafing at the failures and obstructed opportunities life threw at him.

The thing he could not abide losing was the disappearing right of the nobility to enter into a feud or vendetta. This scans to the modern like rank anarchy, but feuds were part of the tapestry of medieval German society, long codified in law — an obvious descendant of clan and tribal obligations out of which the muddle of feudal vassalage had formed. “The passion for liberty and rights,” says this volume, “ran amok in Germany. Churchmen, princes, burghers, and peasants all wanted their independence and readily resorted to declarations of feud to secure and defend their rights.”

The standing right for miscellaneous minor lords to start miscellaneous private wars was quite naturally one that princes were ever keen to restrict. After centuries of two-steps-forward, one-step-back efforts to deal with the feud, the 1495 Imperial Diet formally codified a ban on feuding known as the Ewiger Landfriede, or “perpetual peace”. In Poli Sci 101 terms, this is the state finally monopolizing legitimate violence.

As with dueling, however, official proscription did not end the practice. It was, indeed, Grumbach’s defeat and execution that would eventually be remembered as the decisive nail in the coffin for knightly feuds.

And so in Franconia where we lay our scene will civil blood make civil hands unclean …

Grumbach’s liege was Melchior Zobel von Giebelstadt, the Prince-Bishop of Wurzburg. (Still another confusing dimension of the political map, some princes of Germany’s many statelets were simultaneously ecclesiastical authorities. For purposes of this post, the “-Bishop” part doesn’t enter into it.)

Knights’ basic problem — the reason they were vulnerable to losing their wacky old-time rights — was poverty, and it was in money that Grumbach’s feud was rooted. Grumbach’s personal twist on this was being the sort of irascible, reckless coot who could carry a grudge so far as to get himself sawed into pieces over it.

Immediately upon assuming the Prince-Bishopric in 1544, Melchior Zobel von Giebelstadt forced Grumbach to return an unauthorized cash gift his predecessor had paid to the knight, and then stiffed said knight out of six villages whose revenues Grumbach sought by way of compensation.

He had to deal with Grumbach’s feud for the remainder of his term, which was also the remainder of his life … right up until Grumbach murdered him.

The disaffected knight hooked up with the margrave* Albert Alcibiades and started making a right mess in the middle of Europe with a 1552-54 mini-war. When Albert got thumped, Grumbach had to evacuate to France, and his holdings outside Wurzburg were plundered and/or destroyed by his foes.

So now the guy was even more aggrieved, and even more pfennigless.

He was downright vengeful about his feud at this point, although it’s noteworthy relative to that monopolization-of-violence trend that he was still the only one: in days of yore, intra-elite wars might have spawned multiple self-reproducing vendettas.

The grumpy Grumbach now hooked up with another patron,** the deposed elector of Saxony Johann Friedrich II — another dude who felt hard done by in the Holy Roman Empire.

Grumbach evened his score with Melchior von Zobel by having the Prince-Bishop killed in Wurzburg in April 1558. (In present-day Wurzburg, three Zobelsaulen markers commemorate the Prince-Bishop’s assassination, one on the very spot of the murder.)

But that still left the money, and we know Grumbach wasn’t the type to write off a debt. In 1563, he successfully invaded Wurzburg with 1,300 soldiers and at swordpoint forced from the city a concession restoring his property.

For Grumbach, it was to prove a Pyrrhic victory.

In principle, he had achieved a great vindication of the ancient right of the feud, and for the hard-pressed nobility against the realms’ many princes. If others of his station had rallied to that banner, what a whirlwind Germany would have reaped.

Grumbach was in fact hatching an extravagant scheme† to liberate the entire German nobility … from the yoke of the princes. It was a radical aristocratic utopia … nobles were not only to be protected by the [Holy Roman] emperor from the princes, but to help him subdue them once and for all and to establish an hereditary monarchy in Germany. But despite Grumbach’s best efforts to incite the Franconian nobility, they did not line up behind him. Guidied by the captain of the Franconian Circle (Kreis), Georg Ludwig von Seinsheim, who denounced Grumbach’s undertaking as ‘against God, law and the emperor’, they formally turned away from him in 1564. In the view of the majority of them, the Knighthood was to maintain its autonomy by respecting the equilibrium between emperor and princes, not by irresponsibly challenging the latter. And it was this view, reassuringly transmitted to the princes, which carried the day.

Grumbach was outlawed by the empire and in 1566-67 was overcome with his protector Johann Friedrich at Gotha. Both men spent he remainder of their lives as imperial prisoners, with the notable difference that Johann Friedrich had the pull to live out his natural ration of days while Grumbach went straight to the dungeon for torture and thence to the scaffold in the town that had lately been his last redoubt. There, Grumbach was ripped apart — his dying eyes beheld the executioner wrench the heart out of his very chest and taunt him: “Behold, Grumbach, thy false heart!” The late knight’s rotting quartered remains got nailed up around town to broadcast the unmistakable message:

The noble right to feud was dead.

* Hereditary military commander.

** Among their other capers, Grumbach and his patron Johann Friedrich conspired with Torben Oxe‘s nephew Peder Oxe to depose the Danish king Frederick II in favor of the king’s grand-niece, Christina. (Christina will be known to Tudor-philes as the young woman who scuttled Henry VIII’s post-Anne Boleyn suit with the sharp remark, “If I had two heads, one should be at the King of England’s disposal.”) Nothing came of the plot. (Source)

† Christian Wieland writes that Grumbach deployed — unsuccessfully but still impressively — a 16th century multimedia propaganda campaign to state his case to the “common nobleman”: woodblock-illustrated printed leaflets, songs valorizing the attack on Wurzburg (sample verse: “Violence may be averted by violence / According to natural law”).